Yam is a kind of medicine and food with the same source of medicinal herbs, eat yam on the spleen and stomach has a certain role in tonic, but do not overdose, so as not to cause adverse consequences. Yam taste sweet, sex flat, to the spleen, lungs, kidney meridian, has the spleen and stomach, the birth of the Tsuyoshi benefit lungs, tonifying the kidney astringent effect, used for spleen deficiency, less food, diarrhea more than a long time, lung deficiency, asthma and coughing, kidney deficiency spermatorrhea, bring down, urinary frequency, deficiency of heat and thirst. Bran fried yam tonifies the spleen and strengthens the stomach, and is used for spleen deficiency with little food, diarrhea and loose stools (thin and unformed stools), and excessive leucorrhea. The adverse effects of this drug are not clear. However, as it nourishes yin and helps dampness, it should not be used by people with dampness in the middle of the body (too much dampness causing fullness and discomfort in the spleen and stomach) or with stagnation. Consume yam in moderation and do not overdose. If there is a need for medication, it is recommended that it be used under the guidance of a medical professional, rather than blindly self-medication.